Instructions: First, rinse and stem your tomatoes. Next, slice them in half. In a bowl, combine olive oil, a pinch of salt, garlic powder and Italian seasoning. Stir the ingredients. Then lay out your tomatoes on a baking sheet lined with either aluminum foil or parchment paper to prevent sticking. Bake the tomatoes in the oven at 200 degrees. The tomatoes should take about 2 hours to dry.